4. I Will Always Love You – Whitney Houston

Arguably the most well known love song of all time, it sometimes seems as though every person in the world knows every single lyric to this Whitney Houston classic!

Part of the soundtrack to the hit '90s movie The Bodyguard that spawned several other amazing love songs like "I Have Nothing" and "Run to You," "I Will Always Love You" was originally written and performed by Dolly Parton, and it sounds just as romantic in a country style as it does pop.

Thinking out Loud – Ed Sheeran